[time-nuts] Fwd: Fwd: PicTic Data

Sun Aug 15 15:37:41 UTC 2010

Steve, I'm sure there are several folks here with web sites or download 
areas that could host the files.  If no one else raises their hand, I 
could put them on febo.com.

John
----

Steve Rooke said the following on 08/15/2010 10:53 AM:
> Stanley and Nigel,
>
> I have received the go ahead to distribute the Small DMTD project
> files from Bill. It is in the form of a 500k zip so how do we want to
> play this? For a start, Gmail will not let me send .exe files, even
> though they are inside a zip file and I'm not putting them into a
> password encrypted file to circumvent this so I'll send the archive
> with the extension changed to .xxx. If you don't know how to change
> that back to .zip may I suggest you contact Mr Gates and tell him that
> his method of file typing sucks and is a noddy system fit only for
> Toytown.
>
> Steve
>
>
> ---------- Forwarded message ----------
> From: William Riley<wjriley at embarqmail.com>
> Date: 16 August 2010 02:32
> Subject: Re: Fwd: [time-nuts] PicTic Data
> To: Steve Rooke<sar10538 at gmail.com>
>
>
> Steve:
>
> You are welcome to freely distribute the Small DMTD files.
>
> Best regards,
> Bill
>
> W.J. Riley
> Hamilton Technical Services
> 650 Distant Island Drive
> Beaufort, SC 29907-1580 USA
> Phone: 843-525-6495
> Fax: 843-525-0251
> E-Mail: bill at wriley.com
> Web: www.wriley.com
>
> --------------------------------------------------
> From: "Steve Rooke"<sar10538 at gmail.com>
> Sent: Sunday, August 15, 2010 8:39 AM
> To:<bill at wriley.com>
> Subject: Fwd: [time-nuts] PicTic Data
>
>> Hello Bill,
>>
>> I have not started on the DMTD project yet as I'm still in the process
>> of building Richard's PICTIC II boards but Stanley Reynolds posted
>> about your DMTD expressing a desire to build them. As I have all the
>> info needed for this, I would be in a position to supply him and
>> anyone else with this data BUT this depends upon your willingness for
>> the distribution of your design to go beyond myself. If you are happy
>> for me to do this, I will, otherwise, i will refrain from doing this?
>>
>> Best regards,
>> Steve
>>
>> ---------- Forwarded message ----------
>> From: Steve Rooke<sar10538 at gmail.com>
>> Date: 16 August 2010 00:05
>> Subject: Re: [time-nuts] PicTic Data
>> To: Discussion of precise time and frequency measurement<time-nuts at febo.com>
>>
>>
>> On 15 August 2010 17:01, Stanley Reynolds<stanley_reynolds at yahoo.com>  wrote:
>>>
>>> Thanks for looking at my data that was what I was fishing for all along :-)
>>>
>>> I was looking at the article:
>>>
>>> "A Small Dual Mixer Time Difference (DMTD) Clock Measuring System W.J. Riley"
>>> Richard posted
>>>
>>> And thinking it would be nice to do the DSS and Mixer boards to go with the
>>> pictic II.
>>
>> I have been speaking to Bill Riley about doing this myself and he has
>> sent me all the board designs, software, etc. to enable one to be
>> built. I can ask him if he is OK if I distribute this if you wish.
>>
>> Steve
>>
>>> Or changing the Pictic II to use the Acam TDC GP2 Time to Digital Converter; 2
>>> channel w/65 ps resolution now under $30. as Bruce suggested a while back.
>>>
>>> My wants sure exceed my cans ;-)
>>>
>>> Stanley
>>>
>>>
>>>
>>> ----- Original Message ----
>>> From: John Miles<jmiles at pop.net>
>>> To: Discussion of precise time and frequency measurement<time-nuts at febo.com>
>>> Sent: Sat, August 14, 2010 11:25:44 PM
>>> Subject: Re: [time-nuts] PicTic Data
>>>
>>>
>>>> John glad you are getting good results and have something to
>>>> compare to. Back to
>>>> me who doesn't have any knowns but lots of guessing. Attached is
>>>> a run with a
>>>> box cover over the pictic, run is shorter ~ 800 seconds but the
>>>> box does look
>>>> like it helps.
>>>> I need to do a lot more testing but sometimes I just get excited :-)
>>>
>>> I imported your .txt file alongside the traces I captured.  Assuming it was
>>> taken with 1 Hz on both START and STOP, it looks like the attached.
>>>
>>> You're getting the exact sort of results that I see if I feed both the START
>>> and STOP inputs at 1 Hz.  My guess is that the onboard oscillator limits the
>>> performance in that case, since it has a lot of time to drift during the
>>> measurement if the two pulses occur close to 1 second apart.  Even the 5370B
>>> looks much worse if driven with 1 Hz on both inputs than it does with 1 Hz
>>> at START and 10 MHz at STOP.
>>>
>>> So I think you're basically up and running OK.  When I get around to trying
>>> a better clock, I'll also go back and see if the 1-pps x2 performance
>>> improves.
>>>
>>> It would be great if the next spin of the board could include sine-to-CMOS
>>> shapers for the input channels as well as an external clock input, for
>>> people who are working directly with RF signals as opposed to 1-pps.
>>>
>>> -- john, KE5FX
>>>
>>>
>>>> ----- Original Message ----
>>>> From: John Miles<jmiles at pop.net>
>>>> To: Discussion of precise time and frequency measurement
>>>> <time-nuts at febo.com>
>>>> Sent: Sat, August 14, 2010 10:19:46 PM
>>>> Subject: Re: [time-nuts] PicTic Data
>>>>
>>>> A few preliminary measurements here (I'm working on getting some software
>>>> support together):
>>>> http://www.ke5fx.com/pictic.htm
>>>>
>>>> -- john, KE5FX
>>>>
>>>>> -----Original Message-----
>>>>> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
>>>>> Behalf Of Stanley Reynolds
>>>>> Sent: Saturday, August 14, 2010 7:12 PM
>>>>> To: Discussion of precise time and frequency measurement
>>>>> Subject: Re: [time-nuts] PicTic Data
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> My guess as to what the data may indicate is performance of the
>>>>> 10 Mhz 20PPM
>>>>> PICTIC internal oscillator, need to repeat test with precision
>>>>> 10Mhz and auto
>>>>> calibrate off. Fatness of the line/width maybe PICTIC error. Note
>>>>> graph seems to
>>>>> show me leaving the room and returning via the outside door. Not
>>>>> sure what the
>>>>> ~100 sec oscillations are, need to check a/c cycle time.
>>>>>
>>>>> Stanley
>>>>>
>>>>> _______________________________________________
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>>>>>
>>>>
>>>>
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>>
>>
>>
>> --
>> Steve Rooke - ZL3TUV&  G8KVD
>> The only reason for time is so that everything doesn't happen at once.
>> - Einstein
>>
>>
>>
>> --
>> Steve Rooke - ZL3TUV&  G8KVD
>> The only reason for time is so that everything doesn't happen at once.
>> - Einstein
>
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